层层: layer upon layer; ring upon ...发动: start; launch; engine on; ge ...平流层发动机: stratosphere engine层层: layer upon layer; ring upon ring; tier upon tier垫层层: under layer边界层发展: development of boundary layer表层发酵: surface fermentation; top fermentation低层发酵: low fermentation; lower fermentation; sedimentary fermentation底层发酵: bottom fermentation断层发育: mature fault分层发泡: layer-on-layer foaming分层发展: flatted development管理层发展: management development上层发酵: high fermentation上胚层发育: epiblastic development深层发酵: deep fermentation; deep submerged fermentation; submerged fermentation涂层发白: white spotted finishlit层层的: lit by; lit partier层层叠叠: tier upon薄层层析: thin layer chromatography; thin-layer chromatography; tlc薄层层析板: tlc plate薄层层析法: thin layer chromatography; thin-layer chromatography薄层层析术: thin-layer chromatography (tlc)薄层层析图: thin-layer chromatogram层层把关: make checks [check up] at all levels; check at each level
